Bottom lashes are the part of the set nobody thinks about until they see a photo of themselves. You get a beautiful top set, you love it for three weeks, and then someone takes a picture from slightly below and suddenly your lower lash line looks bare by comparison. That is usually the moment a client asks me about bottom lash extensions — and it is a fair question with a more nuanced answer than most people expect. Here is everything I tell my Spokane Valley clients before they book them.
Bottom lash extensions are individual extensions applied to the natural lashes on your lower lash line. The technique is the same one used on top: I isolate a single natural lash, and bond a single extension to it a fraction of a millimetre from the skin. Nothing is glued to your skin, and nothing is glued to a neighbouring lash.
What changes is the scale, and it changes dramatically. Where a top set typically runs 8 to 15 millimetres in length, bottom extensions usually sit in the 4 to 7 millimetre range. They are also finer in diameter, and they are almost always applied as single classic extensions rather than volume fans, because your natural lower lashes are simply too fine to carry the extra weight of a fan without being pulled on.
The other thing that changes is quantity. A full top set might involve 80 to 150 natural lashes per eye. Your lower lash line has far fewer usable lashes — often 20 to 40 per eye that are long and healthy enough to hold an extension. So a bottom application is faster than people assume, but it is fiddly work: the lashes are shorter, finer, closer together, and closer to the skin, which means isolation has to be very precise.
The realistic result is definition, not drama. A good bottom application makes your lower lash line look denser and slightly darker — the effect you would get from very carefully applied mascara, minus the mascara. It makes the eye look more finished and more balanced against a full top set, and it closes the visual gap that some people notice under bright light or in close-up photos.
What it does not do is open the eye. This is the most common misconception I correct in consultation. Length on the top lash line lifts and opens; length on the bottom lash line pulls the eye downward and can make the under-eye area look longer and more shadowed. That is exactly why restraint matters so much here, and why I would rather do a set that looks too subtle than one that looks too much.
If you want the eye to look bigger and more awake, that job belongs to your top set — specifically to curl and mapping. My guide to choosing the right lash curl and length walks through how those decisions actually change the shape of your eye.
In my experience, bottom lashes make the biggest difference for a few specific groups:
I turn down bottom lash requests more often than any other service, and I would rather say so honestly than take the booking. You are probably not a good candidate if:
None of these are permanent disqualifications. Sleep position and skincare can be adjusted. But they should be a conversation before the appointment, not a disappointment after it.
This is the part that surprises people most: roughly one to three weeks, compared with the four to six weeks most of my clients get between top-set fills. There are three reasons, and none of them reflect on the application.
First, biology. Lower lashes have a shorter natural growth cycle than upper lashes. They shed faster on their own, and the extension goes with them — which is exactly what should happen.
Second, physics. There is less lash surface for the adhesive to bond to, because the lashes are shorter and finer. A smaller bond point means a shorter-lived bond, no matter how good the glue is.
Third, friction. Your lower lash line rests against your cheek, your pillow, your towel, your sunglasses and every product you put under your eyes. The top set has none of that daily contact.
So most clients treat bottom lashes as an event service rather than a permanent part of their routine — added a few days before a wedding, a vacation or a photo session. Some clients do maintain them year-round and simply have them refreshed at each top-set fill, which works well if your habits suit them. If your top set is not lasting as long as you would like either, my post on why your lash extensions aren't lasting covers the usual culprits.
Shorter than you think. The working rule is that a bottom extension should not exceed the length of a healthy natural lash by much — and it should always read shorter than your top set by a clear margin. Most maps I build fall between 4 and 6 millimetres, with the shortest lengths in the inner corner and a millimetre or two more toward the outer third. Going longer is the single fastest way to make a set look harsh.
Bottom lashes grow downward, so aggressive curls fight the natural direction and look artificial. Straighter curls — the flat and gently curved options rather than the dramatic ones I would use on top — follow the lash line and look far more believable. A curl that lifts too much on the bottom tends to poke toward the cheek and can feel scratchy.
Fine diameters only. Your lower natural lashes are thinner than your upper ones, and the weight rule does not change just because the extension is short. If a lash cannot comfortably carry the extension, it will be pulled out early, which is neither good retention nor good for your lashes.
I rarely lash every single natural lower lash. Skipping strategically — heavier through the outer half, sparser at the inner corner — produces a softer, more natural gradient than a solid line of extensions, which can look like a drawn-on liner.
The application itself is straightforward but requires a bit of cooperation. Because your eyes are closed for the top set, bottom lashes have to be worked around that — typically after the top application, with a protective pad placed to shield the lower lash line, or with your eyes gently open for portions of the work depending on the technique and your comfort.
You may be asked to look up or hold still in a specific position for short stretches. It is not uncomfortable, but it is more active than the nap most clients take during a top set. Expect the bottom portion to add roughly 20 to 40 minutes to your appointment depending on how many lashes you have to work with.
One thing worth flagging: if your eyes water easily, tell me at the start. Watering is not dangerous, but it does affect the adhesive, and there are small adjustments I can make to work around it.
The general rules of lash extension aftercare all apply, but three of them matter much more on the lower lash line:
Beyond that: no waterproof mascara on the extensions, no eyelash curler anywhere near them, and no picking. If one is bothering you or feels like it is sitting wrong, come in and let me remove it properly rather than pulling it out.
It is worth being honest about the trade-off, because for a lot of people mascara is still the better answer.
| Bottom Lash Extensions | Lower-Lash Mascara | |
|---|---|---|
| Daily effort | None | Applied and removed daily |
| Smudging | None | Common under the eye |
| How long it lasts | 1–3 weeks | One day |
| Looks good in close-up photos | Yes | Depends on the day |
| Commitment | Appointment time and aftercare | None |
| Best for | Events, makeup-free routines, full top sets | Occasional definition, eye-rubbers, side sleepers |
Applied properly, no. The safety rules are the same as for a top set: one extension on one isolated natural lash, appropriate weight for the lash it sits on, and no adhesive touching the skin. When people report damage to their lower lashes, the cause is almost always one of two things — extensions that were too long or too thick for very fine natural lashes, or the client rubbing and pulling at them.
Because lower lashes start out finer and shorter, there is simply less margin for error, which is why a trained artist who will tell you no is more valuable here than anywhere else on the eye. If you have had a bad experience elsewhere and want them off, please have them removed professionally rather than at home — my guide to removing lash extensions safely explains why.
Bottom lashes come up most often at my Spokane Valley studio in the run-up to weddings, engagement photos and holiday events — anywhere the eyes get photographed close up. Because whether they suit you depends on the condition of your natural lower lashes, your sleep and skincare habits, and what your top set looks like, this is one service I always want to look at in person before committing to it.
The simplest path is to book your regular full set or fill through my booking page and mention bottom lashes in the notes. I will take a look at your lower lash line at the start of the appointment, tell you honestly whether I think they will hold and whether they will flatter you, and we will go from there. If your event is coming up, plan the appointment for three to five days before rather than the day of — the same timing rule I recommend in my guide for brides booking wedding lashes.
Bottom lash extensions are worth it for a specific person in a specific moment: someone with a full top set, decent natural lower lashes, gentle habits, and a reason to want their eyes to look finished in close-up. For that person they are a genuinely lovely detail that makes everything else look more intentional.
For everyone else — side sleepers, eye-rubbers, anyone with very sparse lower lashes, anyone whose main goal is a bigger and more open-looking eye — the honest answer is that the money and appointment time are better spent on the top set. That is not me talking you out of a service. It is me telling you where the result actually lives.
If you are in Spokane Valley and curious whether your lower lashes are a good candidate, bring it up at your next fill. It takes about thirty seconds to look, and you will get a straight answer.
Book your full set or fill at my Spokane Valley studio — classic from $125, hybrid and volume from $150, UV LED from $175 — and mention bottom lashes in your booking notes. I'll take a look and give you an honest answer.
Book Your Appointment →